Toss the pork with dark soy.,Heat 1 tablespoon of oil in a wok over high heat.,Add the pork and stir-fry for 1 minute.,Add the shiitakes, cook for 1 more minute.,Add the water chestnuts, and bamboo shoots, cook for 3 minutes.,Combine the water, soy sauce, dry sherry, cornstarch, sugar, and pepper, work into a smooth paste.,Add to the wok, stir to completely coat.,Cook for 2 minutes.,Remove from the heat.,Add the bean sprouts, green onions, and ginger.,Brush your pancakes with a little hoisin.,______,Roll up and serve.